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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
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USGS Water-Year Summary 2024
03471500 SOUTH FORK HOLSTON RIVER AT RIVERSIDE, NEAR CHILHOWIE, VA
LOCATION - Lat 36°45'37", long 81°37'53" referenced to North American Datum of 1927, Smyth County, VA, Hydrologic Unit 06010102, on right bank 400 ft upstream from highway bridge at Riverside, 900 ft upstream from Spring Branch, 3.2 mi downstream from Redstone Branch, 4.0 mi southeast of Chilhowie, and at mile 97.2.
DRAINAGE AREA - 76.6 mi².
REVISIONS HISTORY - WSP 1033: 1943-44(m). WSP 1306: 1921-31(M). OFR 2006-1308: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - October 1920 to December 1931, July 1942 to current year. Monthly discharge only for some periods, published in WSP 1306. Prior to October 1924, published as "near Chilhowie." June 1907 to December 1909, at site 4.5 mi downstream also published as "near Chilhowie"; records not equivalent.
GAGE - Water-stage recorder. Datum of gage is 2,106.71 ft NAVD of 1988. Nov. 1, 1920, to Nov. 14, 1931, nonrecording gage at site 400 ft downstream, at present datum.
REMARKS - Prior to August 1951, diurnal fluctuation at low flow caused by mill 500 ft upstream from station. Maximum discharge, 9,600 ft³/s, from rating curve extended above 3,700 ft³/s on basis of slope-area measurement of peak flow. Minimum discharge recorded, 2 ft³/s, but may have been less in 1925 and 1926 before installation of water-stage recorder. Water-quality records for some prior periods have been collected at this location.
